drivers/pnp/interface.c - kernel/msm-4.19 - Gitiles

 /*
  * interface.c - contains everything related to the user interface
  *
  * Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz>
  * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
  */

 #include <linux/pnp.h>
 #include <linux/string.h>
 #include <linux/errno.h>
 #include <linux/list.h>
 #include <linux/types.h>
 #include <linux/pnp.h>
 #include <linux/stat.h>
 #include <linux/ctype.h>
 #include <linux/slab.h>
 #include <linux/mutex.h>

 #include <asm/uaccess.h>

 #include "base.h"

 struct pnp_info_buffer {
 	char *buffer;		/* pointer to begin of buffer */
 	char *curr;		/* current position in buffer */
 	unsigned long size;	/* current size */
 	unsigned long len;	/* total length of buffer */
 	int stop;		/* stop flag */
 	int error;		/* error code */
 };

 typedef struct pnp_info_buffer pnp_info_buffer_t;

 static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
 {
 	va_list args;
 	int res;

 	if (buffer->stop || buffer->error)
 		return 0;
 	va_start(args, fmt);
 	res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
 	va_end(args);
 	if (buffer->size + res >= buffer->len) {
 		buffer->stop = 1;
 		return 0;
 	}
 	buffer->curr += res;
 	buffer->size += res;
 	return res;
 }

 static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
 			   struct pnp_port *port)
 {
 	pnp_printf(buffer,
 		   "%sport 0x%x-0x%x, align 0x%x, size 0x%x, %i-bit address decoding\n",
 		   space, port->min, port->max,
 		   port->align ? (port->align - 1) : 0, port->size,
 		   port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);
 }

 static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
 			  struct pnp_irq *irq)
 {
 	int first = 1, i;

 	pnp_printf(buffer, "%sirq ", space);
 	for (i = 0; i < PNP_IRQ_NR; i++)
 		if (test_bit(i, irq->map.bits)) {
 			if (!first) {
 				pnp_printf(buffer, ",");
 			} else {
 				first = 0;
 			}
 			if (i == 2 || i == 9)
 				pnp_printf(buffer, "2/9");
 			else
 				pnp_printf(buffer, "%i", i);
 		}
 	if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
 		pnp_printf(buffer, "<none>");
 	if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
 		pnp_printf(buffer, " High-Edge");
 	if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
 		pnp_printf(buffer, " Low-Edge");
 	if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
 		pnp_printf(buffer, " High-Level");
 	if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
 		pnp_printf(buffer, " Low-Level");
 	pnp_printf(buffer, "\n");
 }

 static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
 			  struct pnp_dma *dma)
 {
 	int first = 1, i;
 	char *s;

 	pnp_printf(buffer, "%sdma ", space);
 	for (i = 0; i < 8; i++)
 		if (dma->map & (1 << i)) {
 			if (!first) {
 				pnp_printf(buffer, ",");
 			} else {
 				first = 0;
 			}
 			pnp_printf(buffer, "%i", i);
 		}
 	if (!dma->map)
 		pnp_printf(buffer, "<none>");
 	switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
 	case IORESOURCE_DMA_8BIT:
 		s = "8-bit";
 		break;
 	case IORESOURCE_DMA_8AND16BIT:
 		s = "8-bit&16-bit";
 		break;
 	default:
 		s = "16-bit";
 	}
 	pnp_printf(buffer, " %s", s);
 	if (dma->flags & IORESOURCE_DMA_MASTER)
 		pnp_printf(buffer, " master");
 	if (dma->flags & IORESOURCE_DMA_BYTE)
 		pnp_printf(buffer, " byte-count");
 	if (dma->flags & IORESOURCE_DMA_WORD)
 		pnp_printf(buffer, " word-count");
 	switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
 	case IORESOURCE_DMA_TYPEA:
 		s = "type-A";
 		break;
 	case IORESOURCE_DMA_TYPEB:
 		s = "type-B";
 		break;
 	case IORESOURCE_DMA_TYPEF:
 		s = "type-F";
 		break;
 	default:
 		s = "compatible";
 		break;
 	}
 	pnp_printf(buffer, " %s\n", s);
 }

 static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
 			  struct pnp_mem *mem)
 {
 	char *s;

 	pnp_printf(buffer, "%sMemory 0x%x-0x%x, align 0x%x, size 0x%x",
 		   space, mem->min, mem->max, mem->align, mem->size);
 	if (mem->flags & IORESOURCE_MEM_WRITEABLE)
 		pnp_printf(buffer, ", writeable");
 	if (mem->flags & IORESOURCE_MEM_CACHEABLE)
 		pnp_printf(buffer, ", cacheable");
 	if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
 		pnp_printf(buffer, ", range-length");
 	if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
 		pnp_printf(buffer, ", shadowable");
 	if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
 		pnp_printf(buffer, ", expansion ROM");
 	switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
 	case IORESOURCE_MEM_8BIT:
 		s = "8-bit";
 		break;
 	case IORESOURCE_MEM_8AND16BIT:
 		s = "8-bit&16-bit";
 		break;
 	case IORESOURCE_MEM_32BIT:
 		s = "32-bit";
 		break;
 	default:
 		s = "16-bit";
 	}
 	pnp_printf(buffer, ", %s\n", s);
 }

 static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
 			     struct pnp_option *option, int dep)
 {
 	char *s;
 	struct pnp_port *port;
 	struct pnp_irq *irq;
 	struct pnp_dma *dma;
 	struct pnp_mem *mem;

 	if (dep) {
 		switch (option->priority) {
 		case PNP_RES_PRIORITY_PREFERRED:
 			s = "preferred";
 			break;
 		case PNP_RES_PRIORITY_ACCEPTABLE:
 			s = "acceptable";
 			break;
 		case PNP_RES_PRIORITY_FUNCTIONAL:
 			s = "functional";
 			break;
 		default:
 			s = "invalid";
 		}
 		pnp_printf(buffer, "Dependent: %02i - Priority %s\n", dep, s);
 	}

 	for (port = option->port; port; port = port->next)
 		pnp_print_port(buffer, space, port);
 	for (irq = option->irq; irq; irq = irq->next)
 		pnp_print_irq(buffer, space, irq);
 	for (dma = option->dma; dma; dma = dma->next)
 		pnp_print_dma(buffer, space, dma);
 	for (mem = option->mem; mem; mem = mem->next)
 		pnp_print_mem(buffer, space, mem);
 }

 static ssize_t pnp_show_options(struct device *dmdev,
 				struct device_attribute *attr, char *buf)
 {
 	struct pnp_dev *dev = to_pnp_dev(dmdev);
 	pnp_info_buffer_t *buffer;
 	struct pnp_option *independent = dev->independent;
 	struct pnp_option *dependent = dev->dependent;
 	int ret, dep = 1;

 	buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
 	if (!buffer)
 		return -ENOMEM;

 	buffer->len = PAGE_SIZE;
 	buffer->buffer = buf;
 	buffer->curr = buffer->buffer;
 	if (independent)
 		pnp_print_option(buffer, "", independent, 0);

 	while (dependent) {
 		pnp_print_option(buffer, "   ", dependent, dep);
 		dependent = dependent->next;
 		dep++;
 	}
 	ret = (buffer->curr - buf);
 	kfree(buffer);
 	return ret;
 }

 static DEVICE_ATTR(options, S_IRUGO, pnp_show_options, NULL);

 static ssize_t pnp_show_current_resources(struct device *dmdev,
 					  struct device_attribute *attr,
 					  char *buf)
 {
 	struct pnp_dev *dev = to_pnp_dev(dmdev);
 	pnp_info_buffer_t *buffer;
 	struct pnp_resource *pnp_res;
 	struct resource *res;
 	int ret;

 	if (!dev)
 		return -EINVAL;

 	buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
 	if (!buffer)
 		return -ENOMEM;

 	buffer->len = PAGE_SIZE;
 	buffer->buffer = buf;
 	buffer->curr = buffer->buffer;

 	pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");

 	list_for_each_entry(pnp_res, &dev->resources, list) {
 		res = &pnp_res->res;

 		pnp_printf(buffer, pnp_resource_type_name(res));

 		if (res->flags & IORESOURCE_DISABLED) {
 			pnp_printf(buffer, " disabled\n");
 			continue;
 		}

 		switch (pnp_resource_type(res)) {
 		case IORESOURCE_IO:
 		case IORESOURCE_MEM:
 			pnp_printf(buffer, " %#llx-%#llx\n",
 				   (unsigned long long) res->start,
 				   (unsigned long long) res->end);
 			break;
 		case IORESOURCE_IRQ:
 		case IORESOURCE_DMA:
 			pnp_printf(buffer, " %lld\n",
 				   (unsigned long long) res->start);
 			break;
 		}
 	}

 	ret = (buffer->curr - buf);
 	kfree(buffer);
 	return ret;
 }

 static ssize_t pnp_set_current_resources(struct device *dmdev,
 					 struct device_attribute *attr,
 					 const char *ubuf, size_t count)
 {
 	struct pnp_dev *dev = to_pnp_dev(dmdev);
 	char *buf = (void *)ubuf;
 	int retval = 0;
 	resource_size_t start, end;

 	if (dev->status & PNP_ATTACHED) {
 		retval = -EBUSY;
 		dev_info(&dev->dev, "in use; can't configure\n");
 		goto done;
 	}

 	while (isspace(*buf))
 		++buf;
 	if (!strnicmp(buf, "disable", 7)) {
 		retval = pnp_disable_dev(dev);
 		goto done;
 	}
 	if (!strnicmp(buf, "activate", 8)) {
 		retval = pnp_activate_dev(dev);
 		goto done;
 	}
 	if (!strnicmp(buf, "fill", 4)) {
 		if (dev->active)
 			goto done;
 		retval = pnp_auto_config_dev(dev);
 		goto done;
 	}
 	if (!strnicmp(buf, "auto", 4)) {
 		if (dev->active)
 			goto done;
 		pnp_init_resources(dev);
 		retval = pnp_auto_config_dev(dev);
 		goto done;
 	}
 	if (!strnicmp(buf, "clear", 5)) {
 		if (dev->active)
 			goto done;
 		pnp_init_resources(dev);
 		goto done;
 	}
 	if (!strnicmp(buf, "get", 3)) {
 		mutex_lock(&pnp_res_mutex);
 		if (pnp_can_read(dev))
 			dev->protocol->get(dev);
 		mutex_unlock(&pnp_res_mutex);
 		goto done;
 	}
 	if (!strnicmp(buf, "set", 3)) {
 		if (dev->active)
 			goto done;
 		buf += 3;
 		pnp_init_resources(dev);
 		mutex_lock(&pnp_res_mutex);
 		while (1) {
 			while (isspace(*buf))
 				++buf;
 			if (!strnicmp(buf, "io", 2)) {
 				buf += 2;
 				while (isspace(*buf))
 					++buf;
 				start = simple_strtoul(buf, &buf, 0);
 				while (isspace(*buf))
 					++buf;
 				if (*buf == '-') {
 					buf += 1;
 					while (isspace(*buf))
 						++buf;
 					end = simple_strtoul(buf, &buf, 0);
 				} else
 					end = start;
 				pnp_add_io_resource(dev, start, end, 0);
 				continue;
 			}
 			if (!strnicmp(buf, "mem", 3)) {
 				buf += 3;
 				while (isspace(*buf))
 					++buf;
 				start = simple_strtoul(buf, &buf, 0);
 				while (isspace(*buf))
 					++buf;
 				if (*buf == '-') {
 					buf += 1;
 					while (isspace(*buf))
 						++buf;
 					end = simple_strtoul(buf, &buf, 0);
 				} else
 					end = start;
 				pnp_add_mem_resource(dev, start, end, 0);
 				continue;
 			}
 			if (!strnicmp(buf, "irq", 3)) {
 				buf += 3;
 				while (isspace(*buf))
 					++buf;
 				start = simple_strtoul(buf, &buf, 0);
 				pnp_add_irq_resource(dev, start, 0);
 				continue;
 			}
 			if (!strnicmp(buf, "dma", 3)) {
 				buf += 3;
 				while (isspace(*buf))
 					++buf;
 				start = simple_strtoul(buf, &buf, 0);
 				pnp_add_dma_resource(dev, start, 0);
 				continue;
 			}
 			break;
 		}
 		mutex_unlock(&pnp_res_mutex);
 		goto done;
 	}

 done:
 	if (retval < 0)
 		return retval;
 	return count;
 }

 static DEVICE_ATTR(resources, S_IRUGO | S_IWUSR,
 		   pnp_show_current_resources, pnp_set_current_resources);

 static ssize_t pnp_show_current_ids(struct device *dmdev,
 				    struct device_attribute *attr, char *buf)
 {
 	char *str = buf;
 	struct pnp_dev *dev = to_pnp_dev(dmdev);
 	struct pnp_id *pos = dev->id;

 	while (pos) {
 		str += sprintf(str, "%s\n", pos->id);
 		pos = pos->next;
 	}
 	return (str - buf);
 }

 static DEVICE_ATTR(id, S_IRUGO, pnp_show_current_ids, NULL);

 int pnp_interface_attach_device(struct pnp_dev *dev)
 {
 	int rc = device_create_file(&dev->dev, &dev_attr_options);

 	if (rc)
 		goto err;
 	rc = device_create_file(&dev->dev, &dev_attr_resources);
 	if (rc)
 		goto err_opt;
 	rc = device_create_file(&dev->dev, &dev_attr_id);
 	if (rc)
 		goto err_res;

 	return 0;

 err_res:
 	device_remove_file(&dev->dev, &dev_attr_resources);
 err_opt:
 	device_remove_file(&dev->dev, &dev_attr_options);
 err:
 	return rc;
 }
	/*
	* interface.c - contains everything related to the user interface
	*
	* Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz>
	* Copyright 2002 Adam Belay <ambx1@neo.rr.com>
	*/

	#include <linux/pnp.h>
	#include <linux/string.h>
	#include <linux/errno.h>
	#include <linux/list.h>
	#include <linux/types.h>
	#include <linux/pnp.h>
	#include <linux/stat.h>
	#include <linux/ctype.h>
	#include <linux/slab.h>
	#include <linux/mutex.h>

	#include <asm/uaccess.h>

	#include "base.h"

	struct pnp_info_buffer {
	char buffer; / pointer to begin of buffer */
	char curr; / current position in buffer */
	unsigned long size; /* current size */
	unsigned long len; /* total length of buffer */
	int stop; /* stop flag */
	int error; /* error code */
	};

	typedef struct pnp_info_buffer pnp_info_buffer_t;

	static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
	{
	va_list args;
	int res;

	if (buffer->stop \|\| buffer->error)
	return 0;
	va_start(args, fmt);
	res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
	va_end(args);
	if (buffer->size + res >= buffer->len) {
	buffer->stop = 1;
	return 0;
	}
	buffer->curr += res;
	buffer->size += res;
	return res;
	}

	static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
	struct pnp_port *port)
	{
	pnp_printf(buffer,
	"%sport 0x%x-0x%x, align 0x%x, size 0x%x, %i-bit address decoding\n",
	space, port->min, port->max,
	port->align ? (port->align - 1) : 0, port->size,
	port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);
	}

	static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
	struct pnp_irq *irq)
	{
	int first = 1, i;

	pnp_printf(buffer, "%sirq ", space);
	for (i = 0; i < PNP_IRQ_NR; i++)
	if (test_bit(i, irq->map.bits)) {
	if (!first) {
	pnp_printf(buffer, ",");
	} else {
	first = 0;
	}
	if (i == 2 \|\| i == 9)
	pnp_printf(buffer, "2/9");
	else
	pnp_printf(buffer, "%i", i);
	}
	if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
	pnp_printf(buffer, "<none>");
	if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
	pnp_printf(buffer, " High-Edge");
	if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
	pnp_printf(buffer, " Low-Edge");
	if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
	pnp_printf(buffer, " High-Level");
	if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
	pnp_printf(buffer, " Low-Level");
	pnp_printf(buffer, "\n");
	}

	static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
	struct pnp_dma *dma)
	{
	int first = 1, i;
	char *s;

	pnp_printf(buffer, "%sdma ", space);
	for (i = 0; i < 8; i++)
	if (dma->map & (1 << i)) {
	if (!first) {
	pnp_printf(buffer, ",");
	} else {
	first = 0;
	}
	pnp_printf(buffer, "%i", i);
	}
	if (!dma->map)
	pnp_printf(buffer, "<none>");
	switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
	case IORESOURCE_DMA_8BIT:
	s = "8-bit";
	break;
	case IORESOURCE_DMA_8AND16BIT:
	s = "8-bit&16-bit";
	break;
	default:
	s = "16-bit";
	}
	pnp_printf(buffer, " %s", s);
	if (dma->flags & IORESOURCE_DMA_MASTER)
	pnp_printf(buffer, " master");
	if (dma->flags & IORESOURCE_DMA_BYTE)
	pnp_printf(buffer, " byte-count");
	if (dma->flags & IORESOURCE_DMA_WORD)
	pnp_printf(buffer, " word-count");
	switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
	case IORESOURCE_DMA_TYPEA:
	s = "type-A";
	break;
	case IORESOURCE_DMA_TYPEB:
	s = "type-B";
	break;
	case IORESOURCE_DMA_TYPEF:
	s = "type-F";
	break;
	default:
	s = "compatible";
	break;
	}
	pnp_printf(buffer, " %s\n", s);
	}

	static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
	struct pnp_mem *mem)
	{
	char *s;

	pnp_printf(buffer, "%sMemory 0x%x-0x%x, align 0x%x, size 0x%x",
	space, mem->min, mem->max, mem->align, mem->size);
	if (mem->flags & IORESOURCE_MEM_WRITEABLE)
	pnp_printf(buffer, ", writeable");
	if (mem->flags & IORESOURCE_MEM_CACHEABLE)
	pnp_printf(buffer, ", cacheable");
	if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
	pnp_printf(buffer, ", range-length");
	if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
	pnp_printf(buffer, ", shadowable");
	if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
	pnp_printf(buffer, ", expansion ROM");
	switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
	case IORESOURCE_MEM_8BIT:
	s = "8-bit";
	break;
	case IORESOURCE_MEM_8AND16BIT:
	s = "8-bit&16-bit";
	break;
	case IORESOURCE_MEM_32BIT:
	s = "32-bit";
	break;
	default:
	s = "16-bit";
	}
	pnp_printf(buffer, ", %s\n", s);
	}

	static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
	struct pnp_option *option, int dep)
	{
	char *s;
	struct pnp_port *port;
	struct pnp_irq *irq;
	struct pnp_dma *dma;
	struct pnp_mem *mem;

	if (dep) {
	switch (option->priority) {
	case PNP_RES_PRIORITY_PREFERRED:
	s = "preferred";
	break;
	case PNP_RES_PRIORITY_ACCEPTABLE:
	s = "acceptable";
	break;
	case PNP_RES_PRIORITY_FUNCTIONAL:
	s = "functional";
	break;
	default:
	s = "invalid";
	}
	pnp_printf(buffer, "Dependent: %02i - Priority %s\n", dep, s);
	}

	for (port = option->port; port; port = port->next)
	pnp_print_port(buffer, space, port);
	for (irq = option->irq; irq; irq = irq->next)
	pnp_print_irq(buffer, space, irq);
	for (dma = option->dma; dma; dma = dma->next)
	pnp_print_dma(buffer, space, dma);
	for (mem = option->mem; mem; mem = mem->next)
	pnp_print_mem(buffer, space, mem);
	}

	static ssize_t pnp_show_options(struct device *dmdev,
	struct device_attribute attr, char buf)
	{
	struct pnp_dev *dev = to_pnp_dev(dmdev);
	pnp_info_buffer_t *buffer;
	struct pnp_option *independent = dev->independent;
	struct pnp_option *dependent = dev->dependent;
	int ret, dep = 1;

	buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
	if (!buffer)
	return -ENOMEM;

	buffer->len = PAGE_SIZE;
	buffer->buffer = buf;
	buffer->curr = buffer->buffer;
	if (independent)
	pnp_print_option(buffer, "", independent, 0);

	while (dependent) {
	pnp_print_option(buffer, " ", dependent, dep);
	dependent = dependent->next;
	dep++;
	}
	ret = (buffer->curr - buf);
	kfree(buffer);
	return ret;
	}

	static DEVICE_ATTR(options, S_IRUGO, pnp_show_options, NULL);

	static ssize_t pnp_show_current_resources(struct device *dmdev,
	struct device_attribute *attr,
	char *buf)
	{
	struct pnp_dev *dev = to_pnp_dev(dmdev);
	pnp_info_buffer_t *buffer;
	struct pnp_resource *pnp_res;
	struct resource *res;
	int ret;

	if (!dev)
	return -EINVAL;

	buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
	if (!buffer)
	return -ENOMEM;

	buffer->len = PAGE_SIZE;
	buffer->buffer = buf;
	buffer->curr = buffer->buffer;

	pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");

	list_for_each_entry(pnp_res, &dev->resources, list) {
	res = &pnp_res->res;

	pnp_printf(buffer, pnp_resource_type_name(res));

	if (res->flags & IORESOURCE_DISABLED) {
	pnp_printf(buffer, " disabled\n");
	continue;
	}

	switch (pnp_resource_type(res)) {
	case IORESOURCE_IO:
	case IORESOURCE_MEM:
	pnp_printf(buffer, " %#llx-%#llx\n",
	(unsigned long long) res->start,
	(unsigned long long) res->end);
	break;
	case IORESOURCE_IRQ:
	case IORESOURCE_DMA:
	pnp_printf(buffer, " %lld\n",
	(unsigned long long) res->start);
	break;
	}
	}

	ret = (buffer->curr - buf);
	kfree(buffer);
	return ret;
	}

	static ssize_t pnp_set_current_resources(struct device *dmdev,
	struct device_attribute *attr,
	const char *ubuf, size_t count)
	{
	struct pnp_dev *dev = to_pnp_dev(dmdev);
	char buf = (void )ubuf;
	int retval = 0;
	resource_size_t start, end;

	if (dev->status & PNP_ATTACHED) {
	retval = -EBUSY;
	dev_info(&dev->dev, "in use; can't configure\n");
	goto done;
	}

	while (isspace(*buf))
	++buf;
	if (!strnicmp(buf, "disable", 7)) {
	retval = pnp_disable_dev(dev);
	goto done;
	}
	if (!strnicmp(buf, "activate", 8)) {
	retval = pnp_activate_dev(dev);
	goto done;
	}
	if (!strnicmp(buf, "fill", 4)) {
	if (dev->active)
	goto done;
	retval = pnp_auto_config_dev(dev);
	goto done;
	}
	if (!strnicmp(buf, "auto", 4)) {
	if (dev->active)
	goto done;
	pnp_init_resources(dev);
	retval = pnp_auto_config_dev(dev);
	goto done;
	}
	if (!strnicmp(buf, "clear", 5)) {
	if (dev->active)
	goto done;
	pnp_init_resources(dev);
	goto done;
	}
	if (!strnicmp(buf, "get", 3)) {
	mutex_lock(&pnp_res_mutex);
	if (pnp_can_read(dev))
	dev->protocol->get(dev);
	mutex_unlock(&pnp_res_mutex);
	goto done;
	}
	if (!strnicmp(buf, "set", 3)) {
	if (dev->active)
	goto done;
	buf += 3;
	pnp_init_resources(dev);
	mutex_lock(&pnp_res_mutex);
	while (1) {
	while (isspace(*buf))
	++buf;
	if (!strnicmp(buf, "io", 2)) {
	buf += 2;
	while (isspace(*buf))
	++buf;
	start = simple_strtoul(buf, &buf, 0);
	while (isspace(*buf))
	++buf;
	if (*buf == '-') {
	buf += 1;
	while (isspace(*buf))
	++buf;
	end = simple_strtoul(buf, &buf, 0);
	} else
	end = start;
	pnp_add_io_resource(dev, start, end, 0);
	continue;
	}
	if (!strnicmp(buf, "mem", 3)) {
	buf += 3;
	while (isspace(*buf))
	++buf;
	start = simple_strtoul(buf, &buf, 0);
	while (isspace(*buf))
	++buf;
	if (*buf == '-') {
	buf += 1;
	while (isspace(*buf))
	++buf;
	end = simple_strtoul(buf, &buf, 0);
	} else
	end = start;
	pnp_add_mem_resource(dev, start, end, 0);
	continue;
	}
	if (!strnicmp(buf, "irq", 3)) {
	buf += 3;
	while (isspace(*buf))
	++buf;
	start = simple_strtoul(buf, &buf, 0);
	pnp_add_irq_resource(dev, start, 0);
	continue;
	}
	if (!strnicmp(buf, "dma", 3)) {
	buf += 3;
	while (isspace(*buf))
	++buf;
	start = simple_strtoul(buf, &buf, 0);
	pnp_add_dma_resource(dev, start, 0);
	continue;
	}
	break;
	}
	mutex_unlock(&pnp_res_mutex);
	goto done;
	}

	done:
	if (retval < 0)
	return retval;
	return count;
	}

	static DEVICE_ATTR(resources, S_IRUGO \| S_IWUSR,
	pnp_show_current_resources, pnp_set_current_resources);

	static ssize_t pnp_show_current_ids(struct device *dmdev,
	struct device_attribute attr, char buf)
	{
	char *str = buf;
	struct pnp_dev *dev = to_pnp_dev(dmdev);
	struct pnp_id *pos = dev->id;

	while (pos) {
	str += sprintf(str, "%s\n", pos->id);
	pos = pos->next;
	}
	return (str - buf);
	}

	static DEVICE_ATTR(id, S_IRUGO, pnp_show_current_ids, NULL);

	int pnp_interface_attach_device(struct pnp_dev *dev)
	{
	int rc = device_create_file(&dev->dev, &dev_attr_options);

	if (rc)
	goto err;
	rc = device_create_file(&dev->dev, &dev_attr_resources);
	if (rc)
	goto err_opt;
	rc = device_create_file(&dev->dev, &dev_attr_id);
	if (rc)
	goto err_res;

	return 0;

	err_res:
	device_remove_file(&dev->dev, &dev_attr_resources);
	err_opt:
	device_remove_file(&dev->dev, &dev_attr_options);
	err:
	return rc;
	}